Machine



(No Model.) v 5 Sheets- Sheet 1.

E. KOHLBR.

SEWING MACHINE.

,906. Patented Jan. 12, 1892.

(No Model.) 5 Sheets-Sheet 2.

E. KHLER. SEWING MACHINE. No. 466,906. Patented Jen. 12,1892.

N si 'e k z g a f H N/whg H Wwswsx (No Model.) 5 sheetssheet 3. E KHLER SEWING MACHINE.

Patented Jan. 162,'1892.

(No Model.) E. KHLER' 5 Sheets- Sheet 4.

. SEWING MACHINE.' No. 466,906. Patented Jan. l2, 1892.

5 Sheets-Sheet i5.

(No Model.)

E KOHLER SEWING MACHINE.

,906. Patented Jan. 12, 1892.

` UNTT'ED STATES PATENT OFFICE.

EDVARD KOHLER, OF LONDON, ENGLAND.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 466,906, dated January 12, 18292.

Application filed May 20, 1891.

To @ZZ whom it' may concern.-

Be it known that I, EDWARD KOHLER, of 8l Guilford Street, Russell Square, London, in

' the county of Middlesex, England, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

This invention relates to what are known as hook lock-stitch sewing-machines, and its object is to render such machines capable of producing either a lock-stitch or a chainstitch at will.

The improvement consists in the combinations hereinafter described and claimed, whereby that object is attained.

In the accompanying drawings, Figure l is an end view of so much of a hook lock-stitch sewing-machine as is necessary to show the adaptation of my invention thereto. Fig. 2 is an under side plan View. Figs. 3, 3, 3b, 4., 4, 4b, 5, 5a, and 5b showin diagrammatic form three different positions assumed by the parts during the operation of forming the chainstitch.

The invention may be applied to any hook lock-stitch machine, whether rotary or oscillating; but the machine shown in the drawings is thatknown in the trade as the Jones rotary-hook lock-stitch machine. As these machines are Well known, it is unnecessary to describe them or to show other than those parts necessary to explain my invention.

It may be Well here to dene what is meant in this specification by the term hook-machine in contradistinction to the term shuttle machine used in specification of my United States Patent, No. 449,818, dated April 7, 1891.

By shuttle is meant a loop-opening device to contain a spool or bobbin and capable of being reciprocated in a straight or curved path or rotated or osciliated in a circular race, and the body of which is entirely on one side of the line of the needle.

By hook is meant a lo`op-opeuing device to contain a bobbin or thread-case and capable of being rotated or oseillated in a circular race, and the body of which extends on both sides of the line of the needle.

By means of the first-named device the formed loop is drawn entirely to one side of Serial No. 393,503. (No model.)

formed loop is spread more or less equally on both sides of the line of the needle.

It may be further remarked that a loopopening device consisting of a-hook oscillating in a circular race the body of which extends on both sides of the needle is known in the trade as an oscillating shuttle, and is used in some Singer machines; but for the purposes of this invention such device is classed under the term hook.

Referring now to the drawings, A is the table of the machine.

D is the rotary hook, corresponding to the shuttle in other lock-stitch sewing-machines. This hook is set in a circular race and is actuated through a shaft D', driven in the way common to machines of this type. The bobbi n may be removed from the hook o1l retained therein, as desired, while making the chainstitch, provided the thread be cnt off short in the latter case.

E is the reciprocating loop-holder, (the general form of which is most clearly shown at Fig. 413) which consists of a plate having a fork E and lateral projections or horns E2 at its forward end and a socket E3 in its rear portion. The fork E is designed to enter the loop formed by the rotary hook D and hold it open for the next descent of the needle, and thereby produce a chain-stitch when desired. The exact form of the loop-holder may, however, be varied to some extent; but in every case it will be provided with a fork to enter and hold open the loop. The reciprocation of the loop-holder is effected by means of the pin f, which takes intothe socket E3 of the loop-holder E.

In the hook machines it will not be necessary for the loop-holder to oscillate as well as reciprocate, as in the shuttle machines, for the reasons before mentioned-wiz., that in the shuttle machines the loop is drawn by the shuttle or opening device entirely to Ono side of the needle, and to bring the open loop and present it to the needle it is evident that the loop-holder with the loop upon it must be moved sidewisc.

In the hook-machine the loop is spread so as to extend on both sides of the vertical axis of the needle, and consequently the loopthe needle, whereas by the other device, the

IOO

2 e 466,9oe

holder may reciprocate in line with the Aneedle ,and the sidewise motion will be unnecessary.

The pin f is iitted to a collar Z, having a projecting arm Z, and mounted loosely on a sleeve Y, which is mounted loosely on the shaft X. This shaft operates to lift the feeddog F in the usual manner and forms no part of the present invention. The arm Z carries 1o the spring locking-pin by which the collar Z may be locked to the sleeve Y when desired, as will be well understood. The sleeve Y is rocked throu gh the arm V (keyed thereon) and connecting-rod V by an eccentric Ton i 5 the shaft D. The loop-holder E is therefore actuated from the eccentric T in such a manner that a dwell is provided forat the -most forward point of its reciprocating motion and a comparatively quick motion at another part zo .of its stroke. The above is a convenient ,ar-

rangement for reciprocating the loop-holder; but any other arrangement .may be employed Without departing from the nature of my invention. Upon the under side of the throat- 2 5 plate a short plate c' is fixed close to the nee- (ile-hole and in line with the travel of the loop-holder E, the object of which Ais to hold the loop inside the horns or projections E2 of the loop-holder E (see Fig. 5b) during the 3o take-up, so that the slackened thread shall not tjump off the fork E and cause a missed stitch.

In order to insure the fork of the holder E entering the loop, I may secure on the side of 35. the hook Da metal strip D*, which slightly spreads the loop at its upper part.

The only change required to convert the 1oekstitch machine to a chain-stitch machine will be to adjust the locking pin or bolt to 4o lock the `collar Z to the sleeve Y and to r-emove the hook-bobbin or to sever the hookthread close to the bobbin.

To change the chain-stitch to the lockstitch it is only necessary to bring the loopholder E to its most backward position and then unlock the bolt 11:, which will permit of the sleeve vrocking Without moving the pincollar Z and toreplace the hook-bobbin.

The advantages of my invention are that the fixing of detachable appliances-to thema- 5o lchine to `change the stitch is obviated; also,

that besides the locking and unlocking of the parts the only other change necessary 1s the removing and replacing of the bobbin, a matter of almost hourly occurrence with vsewlngmachinists and one that is well understood, or to cut off the hook-thread, as before de-4 scribed.

The ybobbin-thread may be retained 1n work when an effective embroidery-stitch will be 6o produced, especially if the bobbin-thread 1s of a different color.

Having now described my invention, what I claim is 1. The combination, with a needle and a hook the body of whichextends on both lsides of the needle for opening the loop :of thencedle-thread, -of a reciprocating forked loopholder for entering and retaining the loop 'and holding thesanie yopen in thepath of the 7o ljumping'off the fork `of the loop-holder.

3. The Lcombination for driving the reciprocating loop-holder, consisting of the lrotary shaft D', the shaft X parallel therewith, the

loose sleeve Y .upon the said vshaft X, the collar Z loose upon ysaid shaft, lthe pin f,-carried y by said collar and engaging with 'the :loopholder, the eccentric T, carried by the rotary shaft D, connections, substantially .as herein described, between said eccentric and said 9o sleeve Y, and a looking-bolt .fr for locking said collar to said sleeve, substantially as herein set forth.

EDWARD KOHLER.

Witnesses:

H. K. WHITE, A. W. SPACKMAN. 

